CN218714062U

CN218714062U - Buckling restrained brace

Info

Publication number: CN218714062U
Application number: CN202222624119.9U
Authority: CN
Inventors: 周云; 曹邕生; 李壮
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-03-24
Anticipated expiration: 2032-09-30

Abstract

The utility model belongs to the technical field of building anti-seismic structure technique and specifically relates to a bucking restraint is supported and is related to. Including core steel sheet, restraint steel pipe, spacing bolt and unbonded material, the core steel sheet runs through along length direction the restraint steel pipe, and be located the central point of restraint steel pipe puts, the core steel sheet is located the inside interlude of restraint steel pipe is the yield segment, be equipped with a plurality of through-holes along length direction on the core steel sheet, the core steel sheet both ends are extended the restraint steel pipe is the linkage segment, unbonded material covers the core steel sheet surface, spacing bolt runs through the restraint steel pipe with the core steel sheet, unbonded material with be equipped with filler material between the restraint steel pipe. The utility model provides a simple structure, easily processing, connect convenient, the bucking restraint of economic cost low and support, full play the extensibility performance of core steel sheet, be enough to adapt to different rigidity and intensity demand.

Description

Buckling restrained brace

Technical Field

The utility model belongs to the technical field of building anti-seismic structure technique and specifically relates to a bucking restraint is supported and is related to.

Background

The Buckling restrained brace is also called as a Buckling restrained brace or BRB (Buckling restrained brace), has the characteristic of no Buckling under pressure, can provide lateral stiffness for the main body structure, and can realize energy consumption through reciprocating deformation so as to reduce the reaction of the structure under the action of an earthquake. The buckling restrained brace is generally composed of three parts, namely a core unit, a restraining unit and a sliding mechanism unit, wherein the core unit is a main stress element in a member. The constraining unit, also called as a lateral supporting unit, is responsible for providing a constraining mechanism to prevent the core unit from buckling integrally or at the rest when the core unit is pressed by the shaft. The sliding mechanism unit provides a sliding interface between the core unit and the constraint unit, so that the support has similar mechanical properties as much as possible when being pulled and pressed, and the phenomenon that the core unit generates friction force with the constraint unit after being pressed and expanded to cause a great increase of axial pressure is avoided.

However, the traditional buckling restrained brace is easy to generate residual stress and residual deformation in the production process, so that the energy consumption performance, the fatigue performance and the stability performance are reduced to different degrees, and the fracture position of the buckling restrained brace is difficult to determine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bucking restraint is supported, and this bucking restraint is supported and is connected conveniently, economic cost is low, ensures that the fracture position is located the yield section, also avoids appearing stress concentration.

The utility model provides a bucking restraint is supported, including core steel sheet, restraint steel pipe, spacing bolt and unbonded material, the core steel sheet runs through along length direction the restraint steel pipe, and be located the central point of restraint steel pipe puts, the core steel sheet is located the inside interlude of restraint steel pipe is the yield segment, be equipped with a plurality of through-holes along length direction on the core steel sheet, extend at core steel sheet both ends the restraint steel pipe is the linkage segment, unbonded material covers the core steel sheet surface, spacing bolt runs through the restraint steel pipe with the core steel sheet, unbonded material with be equipped with filler material between the restraint steel pipe.

Preferably, both ends of the constraint steel pipe are provided with cover plates, and the cover plates penetrate through the core steel plate and are fixedly connected with the constraint steel pipe.

Preferably, the cross section of the through hole is a centrosymmetric pattern.

Preferably, the through holes are symmetrically distributed on two sides of the limiting bolt.

Preferably, the limiting bolts are arranged along the width direction of the core steel plate.

Preferably, a plurality of cavities arranged in parallel are arranged in the constraint steel pipe, and the core steel plate is arranged in each cavity.

Preferably, a plurality of core steel plates are arranged in the constraint steel pipe and arranged in parallel.

Preferably, a gap is provided between adjacent core steel plates.

Preferably, the filler material comprises one or more of lightweight concrete, mortar, foam.

Preferably, the connecting section is bolted to the gusset plate.

Has the advantages that:

the utility model provides a buckling restrained brace with simple structure, easy processing, convenient connection and low economic cost, through arranging the through hole on the core steel plate, the peak yielding and the multi-point simultaneous yielding energy consumption are realized, the extensibility of the core steel plate is fully exerted, the buckling restrained brace can adapt to different rigidity and strength requirements, and the buckling restrained brace is ensured to be damaged on the yielding section; and the core steel plate and the constraint steel pipe are fixed by using a limit bolt, so that stress concentration caused by abrupt change of the section is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a core steel plate in embodiment 1 of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 1;

fig. 6 is a schematic view of the operation of embodiment 1 of the present invention;

FIG. 7 isbase:Sub>A sectional view taken along line A-A in example 2;

FIG. 8 isbase:Sub>A sectional view taken along line A-A in example 3;

FIG. 9 isbase:Sub>A sectional view taken along line A-A in example 4;

FIG. 10 isbase:Sub>A sectional view taken along line A-A in example 5;

FIG. 11 isbase:Sub>A sectional view taken along line A-A in example 6;

FIG. 12 isbase:Sub>A sectional view taken along line A-A in example 7;

FIG. 13 is a schematic structural view of a core steel plate according to example 8;

FIG. 14 is a schematic structural view of a core steel plate according to example 9;

FIG. 15 is a schematic structural view of a core steel plate according to example 10;

FIG. 16 is a schematic structural view of a core steel plate according to example 11.

Description of reference numerals:

1-core steel plate, 2-constraint steel pipe, 3-through hole, 4-limit bolt, 5-cover plate, 6-filling material, 7-yield section, 8-connecting section, 9-screw hole, 10-non-adhesive material and 11-gusset plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 6, the buckling restrained brace comprises a core steel plate 1, a restraining steel pipe 2, a limiting bolt 4 and an unbonded material 10, wherein the core steel plate 1 penetrates through the restraining steel pipe 2 along the length direction and is located at the center of the restraining steel pipe 2. The inside interlude of core steel sheet 1 in restraint steel pipe 2 is yield segment 7, and 1 both ends of core steel sheet are extended restraint steel pipe 2 and are linkage segment 8, and non-binding material 10 covers on 1 surface of core steel sheet, and stop bolt 4 runs through restraint steel pipe 2 and core steel sheet 1, and stop bolt 4 is located restraint steel pipe 2 and core steel sheet 1's intermediate position, and stop bolt 4 sets up two along the width direction of core steel sheet 1. The limiting bolt 4 is adopted to connect the constraint steel pipe 2 and the core steel plate 1, so that a limiting clamp in the middle of the core unit is omitted, and stress concentration at the position is avoided. The core steel plate 1 is provided with screw holes 9 corresponding to the limiting bolts 4.

A plurality of through holes 3 are formed in the yield section 7 of the core steel plate 1 along the length direction, and the cross section of each through hole 3 is straight-edge oval. The through holes 3 are symmetrically distributed on two sides of the limiting bolt 4. The through hole 3 is formed in the core steel plate 1, so that the entering plastic deformation of the buckling restrained brace under the axial action can be concentrated in the hole-opening section, the fixed-point yielding and the multi-point simultaneous yielding energy consumption are realized, the extensibility of steel can be fully exerted, and the buckling restrained brace can be ensured to be damaged on the yielding section 7; the size of the through hole 3 is adjusted to be enough to meet different rigidity and strength requirements.

The cross-section of restraint steel pipe 2 is the rectangle, is equipped with two cavitys that set up side by side in the restraint steel pipe 2, all is equipped with a core steel sheet 1 in every cavity, can effectively increase the bearing capacity through many boards collaborative work. Be equipped with the clearance between the adjacent core steel sheet 1, space between the adjacent core steel sheet 1 is inserted to gusset plate 11, and

linkage segment

8 and 11 bolted connection of gusset plate avoid the welding residual stress and the residual deformation that the welding produced to the influence that gusset plate 11 mechanical properties, stability can bring.

And a filling material 6 is arranged between the unbonded material 10 on the surface of the core steel plate 1 and the constraint steel pipe 2, and the filling material 6 comprises one or more of lightweight concrete, mortar and foam. The filling material 6 is poured between the core steel plate 1 and the constraint steel pipe 2, the hoop effect of the constraint steel pipe 2 is fully utilized, the stability of the support is enhanced, the using amount of steel is saved, and the economic cost is lower compared with that of an all-steel plate type buckling constraint support under the same bearing capacity. Both ends of the constraint steel pipe 2 are provided with cover plates 5, and the cover plates 5 penetrate through the core steel plate 1 and are fixedly connected with the constraint steel pipe 2. The connection mode between the cover plate 5 and the constraint steel pipe 2 is welding.

Example 2

As shown in fig. 7, compared with example 1, a buckling restrained brace has substantially the same structure, and the only difference is that a cavity is arranged inside a restrained steel tube 2, and two core steel plates 1 are arranged inside the cavity.

Example 3

As shown in fig. 8, a buckling restrained brace has substantially the same structure as that of example 1, except that a cavity is formed inside a restraining steel pipe 2, and a core steel plate 1 is arranged inside the cavity.

Example 4

As shown in fig. 9, compared with example 1, a buckling restrained brace has substantially the same structure, and the only difference is that two cavities are arranged inside a restrained steel pipe 2, and two core steel plates 1 are arranged in each cavity.

Example 5

As shown in fig. 10, a buckling-restrained brace has substantially the same structure as that of example 1, except that the section of the restraining steel pipe 2 is elliptical.

Example 6

As shown in fig. 11, a buckling-restrained brace has substantially the same structure as that of example 1, except that the cross section of the restraining steel pipe 2 is circular.

Example 7

As shown in fig. 12, a buckling-restrained brace has substantially the same structure as that of example 1, except that the section of the restraining steel pipe 2 is diamond-shaped.

Example 8

As shown in fig. 13, a buckling-restrained brace has substantially the same structure as that of example 1, except that the through-hole 3 of the core steel plate 1 has a rectangular cross-section.

Example 9

As shown in fig. 14, a buckling-restrained brace has substantially the same structure as that of example 1, except that the cross-section of the through-hole 3 of the core steel plate 1 is diamond-shaped.

Example 10

As shown in fig. 15, a buckling-restrained brace has substantially the same structure as that of example 1, except that one of the limit bolts 4 is provided.

Example 11

As shown in fig. 16, a buckling-restrained brace has substantially the same structure as that of example 1, except that the cross section of the connecting section 8 is trapezoidal, so that the connecting area with the gusset plate 11 is enlarged, and the reliability of connection is increased.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

1. The utility model provides a bucking restraint brace, its characterized in that includes core steel sheet, restraint steel pipe, spacing bolt and unbonded material, the core steel sheet runs through along length direction the restraint steel pipe, and is located the central point of restraint steel pipe puts, the core steel sheet is located the inside interlude of restraint steel pipe is the yield segment, be equipped with a plurality of through-holes along length direction on the core steel sheet, the core steel sheet both ends are extended the restraint steel pipe is the linkage segment, unbonded material covers the core steel sheet surface, spacing bolt runs through the restraint steel pipe with the core steel sheet, unbonded material with be equipped with filler material between the restraint steel pipe.

2. The buckling-restrained brace of claim 1, wherein cover plates are disposed at both ends of the restraining steel tube, and the cover plates penetrate through the core steel plate and are fixedly connected with the restraining steel tube.

3. The buckling-restrained brace of claim 1, wherein the through-holes are centrally-symmetric in cross-section.

4. The buckling-restrained brace of claim 1, wherein the through holes are symmetrically distributed on both sides of the limit bolt.

5. The buckling-restrained brace of claim 1, wherein the limiting bolts are arranged in a plurality along the width direction of the core steel plate.

6. The buckling-restrained brace of claim 1, wherein a plurality of cavities are arranged in parallel in the restraining steel tube, and each cavity is internally provided with the core steel plate.

7. The buckling-restrained brace of claim 1, wherein a plurality of the core steel plates are arranged in the restraining steel tube, and the core steel plates are arranged in parallel.

8. The buckling-restrained brace of claim 6 or 7, wherein a gap is provided between adjacent core steel plates.

9. The buckling-restrained brace of claim 1, wherein the connecting section is bolted to a gusset plate.